package com.imooc.controller;

import com.imooc.pojo.Users;
import com.imooc.pojo.bo.UserBO;
import com.imooc.service.UserService;
import com.imooc.utils.CookieUtils;
import com.imooc.utils.IMOOCJSONResult;
import com.imooc.utils.JsonUtils;
import com.imooc.utils.MD5Utils;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import lombok.AllArgsConstructor;
import org.apache.commons.lang3.StringUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@Api(value = "注册登录", tags = {"用于注册登录的相关接口"})
@RestController
@RequestMapping("passport")
@AllArgsConstructor
public class PassportController {


  private final UserService userService;

  @ApiOperation(value = "用户名是否存在", notes = "用户名是否存在", httpMethod = "GET")
  @GetMapping("/usernameIsExist")
  public IMOOCJSONResult usernameIsExist(@RequestParam String username) {

    // 1. 判断用户名不能为空
    if (StringUtils.isBlank(username)) {
      return IMOOCJSONResult.errorMsg("用户名不能为空");
    }

    // 2. 查找注册的用户名是否存在
    boolean isExist = userService.queryUsernameIsExist(username);
    if (isExist) {
      return IMOOCJSONResult.errorMsg("用户名已经存在");
    }

    // 3. 请求成功，用户名没有重复
    return IMOOCJSONResult.ok();
  }

  @ApiOperation(value = "用户注册", notes = "用户注册", httpMethod = "POST")
  @PostMapping("/regist")
  public IMOOCJSONResult regist(@RequestBody UserBO userBO,
      HttpServletRequest request,
      HttpServletResponse response) {

    String username = userBO.getUsername();
    String password = userBO.getPassword();
    String confirmPwd = userBO.getConfirmPassword();

    // 0. 判断用户名和密码必须不为空
    if (StringUtils.isBlank(username) ||
        StringUtils.isBlank(password) ||
        StringUtils.isBlank(confirmPwd)) {
      return IMOOCJSONResult.errorMsg("用户名或密码不能为空");
    }

    // 1. 查询用户名是否存在
    boolean isExist = userService.queryUsernameIsExist(username);
    if (isExist) {
      return IMOOCJSONResult.errorMsg("用户名已经存在");
    }

    // 2. 密码长度不能少于6位
    if (password.length() < 6) {
      return IMOOCJSONResult.errorMsg("密码长度不能少于6");
    }

    // 3. 判断两次密码是否一致
    if (!password.equals(confirmPwd)) {
      return IMOOCJSONResult.errorMsg("两次密码输入不一致");
    }

    // 4. 实现注册
    Users userResult = userService.createUser(userBO);

    userResult = setNullProperty(userResult);

    CookieUtils.setCookie(request, response, "user",
        JsonUtils.objectToJson(userResult), true);

    // TODO 生成用户token，存入redis会话
    // TODO 同步购物车数据

    return IMOOCJSONResult.ok();
  }

  private Users setNullProperty(Users userResult) {
    userResult.setPassword(null);
    userResult.setMobile(null);
    userResult.setEmail(null);
    userResult.setCreatedTime(null);
    userResult.setUpdatedTime(null);
    userResult.setBirthday(null);
    return userResult;
  }

  @ApiOperation(value = "用户登录", notes = "用户登录", httpMethod = "POST")
  @PostMapping("/login")
  public IMOOCJSONResult login(@RequestBody UserBO userBO,
      HttpServletRequest request,
      HttpServletResponse response) throws Exception {
    String username = userBO.getUsername();
    String password = userBO.getPassword();
    // 0. 判断用户名和密码必须不为空
    if (StringUtils.isBlank(username) ||
        StringUtils.isBlank(password)) {
      return IMOOCJSONResult.errorMsg("用户名或密码不能为空");
    }
    // 1. 实现登录
    Users userResult = userService.queryUserForLogin(username,
        MD5Utils.getMD5Str(password));
    if (userResult == null) {
      return IMOOCJSONResult.errorMsg("用户名或密码不正确");
    }
    userResult = setNullProperty(userResult);
    CookieUtils.setCookie(request, response, "user",
        JsonUtils.objectToJson(userResult), true);
    // TODO 生成用户token，存入redis会话
    // TODO 同步购物车数据
    return IMOOCJSONResult.ok(userResult);
  }

  @ApiOperation(value = "用户退出登录", notes = "用户退出登录", httpMethod = "POST")
  @PostMapping("/logout")
  public IMOOCJSONResult logout(@RequestParam String userId,
      HttpServletRequest request,
      HttpServletResponse response) {

    // 清除用户的相关信息的cookie
    CookieUtils.deleteCookie(request, response, "user");
    // TODO 用户退出登录，需要清空购物车
    // TODO 分布式会话中需要清除用户数据
    return IMOOCJSONResult.ok();
  }

}
